Adapter for radial grinding attachments



Oct. 23, 1951 E. V'IDALES 2,572,220

ADAPTER FOR RADIAL GRINDING ATTACHMENTS.

Filed Aug. 51, 1949 2 SI-IEETSSl-IEET 1 I N VEN TOR.

ATTOBN E Y Oct. 23, 1951 E. VIDALES 2,572,220

ADAPTER FOR RADIAL GRINDING ATTACHMENTS Filed Aug. 31, 1949 2 SHEETSSHEET 2 U I INVENTOR. mUfl fE/VEJT W041 5 I BY H ATTOR N .51

fatenteci Oct. 2 3, 51 951 UNITED STATES PATENT OFFICE.

ADAPTER FOR RADIAL GRINDING ATTACHMENTS Ernest Vidales, San Antonio, Tex;

Application August 31, 1949, Serial No. 113,423

1 Claim.

This invention relates to an adapter for supporting a radial grinding attachment of a tool grinder, and has for one of its objects the production of a simple and eilicient means for. supporting a radial grinding attachment for angular adjustment to tilt the radial grinding attachment to a desired angle relative to a conventional grinding wheel. v

A further object of this invention is the production of a simple and eflicient hinged adapter for a radial grinding attachment for facilitating the tilting of the radial grinding attachment at a selected an le and locking the adapter in a selected position.

Other objects and advantages of the present invention will appear throughout the following specification and claim.

In the drawings:

Figure l is a top plan view of the adapter;

Figure 2 is a perspective view of the adapter;

Figure 3 is an end elevational view of the adapter, portions of a conventional tool grinding apparatus being shown in dotted lines Figure 4 is a rear elevational view of the adapter, a portion thereof being shown in section on line 4-4 of Figure 1;

Figure 5 is a transverse sectional view taken on line 5-5 of Figure 1.

By referring to the drawings, it will be seen that In designates the rectangular base-plate of the adapter which may be anchored to the conventional supporting table of a tool grinder by means of suitable anchoring bolts These bolts II which are conventional fit into the notches Hill which are formed in the opposite ends of the base- I plate l and are connected to the table T in the conventional manner.

The base-plate It) may fit flat upon the table of certain types of tool grinders, such for instance, the Cincinnati Tool Grinder, in which event the raising blocks l3 may be removed or detached from the under face of the base-plate or section Ill. The raising blocks l3 are removably held in position by the retaining dowel pins 9 and by abutment with the retaining lugs 8 which lugs 8 are secured to the under face of the base-plate or section ID by means of the screws M. The blocks 3 are provided with oppositely beveled ends I 3 to snugly fit the table of the type of machine such as the Brown and Sharp Tool Grinder and to permit the adapter to be rotated or reversed 180" to obtain a reverse tilt. The blocks l3 will raise the adapted base-plate l0 above the face of the table T in this'instance. The blocks I 3 are notched, as at l3 to register with the notches In formed in the ends of the base-plate Ill to receive the anchoringbolts such as the bolts i shown in Figure 3.

It should be notedthat this invention come prises the adapter itself and does not include the structure of the tool grinding mechanism, since the adapter is designed to be used in connection with various types of tool grinders and radial grinding attachments, radius, milling, form ng and fly cutters. The device also is adapted for use on ball end mills when grinding clearances.

An upper rectangular work-supporting plate or section I5 is hinged, as at I6, to one side edge of the base-plate l0 and carries upstanding bolts I1 and I 8, one being preferably located near each end of the plate l5. The bolts l1 and I8 are adapted to attach the conventional work support l9 to the upper face of the plate l5. Suitable apertures 20 and 2| also are formed in the plate |5 to receive retaining lugs of the conventional work support which may be mounted thereon.

Upstanding guide members 22 and 23 are secured to the front edge 24 of the base plate III by means of the longitudinal anchoring screws, such as the screw 25 shown in Figures 2, 3 and 5. The guide member 22 is provided with an arc slot 26, and the guide member 23 is provided with a similar arc slot 21 which is aligned with the slot 26 of the member 22. The member 22 is provided with suitable graduations 28 upon its outer face, and the member 23 is provided with similar graduations 29 upon its outer face, as shown in Figure 2.

Tightening screws 30 and 3| are carried by the opposite ends of the upper plate |5 near itsforward edge 24 in a position to pass through the respective arc-shaped slots 26 and 21 respectively. The tightening screws 30 and 3| are preferably threaded into the plate l5, as shown in Figure 1, and these screws are provided with binding portions 32 and 33 respectively, which engage the upstanding guide members 22 and 23 tolock the upper plate l5 in a selected adjusted tilted position relative to the base-plate I ll. Knurled knobs 34 and 35 are carried by the tightening screws 30 and 3|, as shown. It will be noted that the guide members 22 and 23 have direct abutting and wiping engagement with the ends of the work supporting section l5.

'From the foregoing description it should be understood that the present device is ada ted to be applied to various types or makes of tool grinders without departing from the spirit of the invention. By using a cup wheel the cutting edge can be ground to a proper angle to protect the cutting edge agains chipping, and it also gives a longer tool life between grinds. When using a cup-shaped wheel to grind a side milling cutter to a radius form, the tilt of the upper plate 15 is adjusted to the desired angle for the first and second relief of the cutter.

Certain detail changes may be made in the detail structure herein set forth without departing from the spirit of the invention, so long as these changes fall within the scope of the appended claim.

Having described the invention, what I claim as new is: 7

An adapter of the class described comprising a base section, a work supporting section hinged to said base section along one side edge thereof, graduated upstanding slotted arc-shaped guide members carried by the base section at the ends thereof, said guide members being curved rearwardly and having direct abutting and wiping engagement with the ends of the work supporting section, tightening screws i irectl'y threaded into the ends of said work supporting section itself and fii'a's'sing through the slotted guide members. said "screws overlapping the slots of the guide member's for frictionally binding the guide members aga nst, the ends of the work supporting section to frictionally lock the work supporting section at 4 a selected angle relative to the base section upon the guide members, upstanding work support engaging bolts carried by said work supporting section, said work supporting section having retaining lug receiving apertures formed therein intermediate the work support engaging bolts, said base section having anchoring bolt receiving apertures at the ends thereof, raising blocks secured to the under face of the base section and having apertures registering with the anchoring bolt receiving apertures, the raising blocks having oppositely beveled ends to snugly fit the table of a selected type of grinder, and dowel pins removably securing the raising blocks to the base section.

ERNEST VIDALES.

REFERENCES CITED The. following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,310,263 Van Der Meulen July 15, 1919 1,521,341 Thacher Dec. 30, 192* 2,113,287 Baldenhofer Apr. 5, 1938 {2,397,308 Tilton Mar. 26', 1946 2,410,955 Torgerson Nov, 12, 1946 2,418,463 Coleman Apr. 8, 1947 

